Stochastic resonance could explain recurrence of Grand Minima

Albert, Carlo; Ulzega, Simone

doi:10.5194/egusphere-egu2020-15185

Publication type:	Conference other
Type of review:	Peer review (abstract)
Title:	Stochastic resonance could explain recurrence of Grand Minima
Authors:	Albert, Carlo Ulzega, Simone
et. al:	No
DOI:	10.5194/egusphere-egu2020-15185
Conference details:	EGU General Assembly 2020, online, 4-8 May 2020
Issue Date:	2020
Language:	English
Subjects:	Solar physics; Stochastic resonance; Stochastic delay-ODE model
Subject (DDC):	500: Natural sciences 510: Mathematics
Abstract:	Proxies of solar activity have revealed repeated Grand Minima that occur with a certain regularity associated with the well-known Gleissberg and Süss/deVries cycles. These and other prominent cycles in the spectrum of solar activity are also seen in the spectrum of the planetary torque exerted on the solar tachocline, which has revived the hypothesis of a planetary influence on solar activity. It is not clear, however, how the extremely weak planetary forcing could influence the solar magnetic activity. Here, we suggest that stochastic resonance could explain the necessary amplification of the forcing and provide numerical evidence from stochastic time-delayed dynamo models. If the intrinsic noise of the solar dynamo allows for a frequent switching between active and quiescent stable states, tiny periodic forcings can be greatly amplified, provided the dynamo is poised close to a critical point. Such a forcing could be caused by a tidal modulation of the minimal magnetic field required for flux-tube buoyancy.
URI:	https://digitalcollection.zhaw.ch/handle/11475/25629
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	Life Sciences and Facility Management
Organisational Unit:	Institute of Computational Life Sciences (ICLS)
Published as part of the ZHAW project:	BISTOM - Bayesian Inference with Stochastic Models
Appears in collections:	Publikationen Life Sciences und Facility Management

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Albert, C., & Ulzega, S. (2020). Stochastic resonance could explain recurrence of Grand Minima. EGU General Assembly 2020, Online, 4-8 May 2020. https://doi.org/10.5194/egusphere-egu2020-15185

Albert, C. and Ulzega, S. (2020) ‘Stochastic resonance could explain recurrence of Grand Minima’, in EGU General Assembly 2020, online, 4-8 May 2020. Available at: https://doi.org/10.5194/egusphere-egu2020-15185.

C. Albert and S. Ulzega, “Stochastic resonance could explain recurrence of Grand Minima,” in EGU General Assembly 2020, online, 4-8 May 2020, 2020. doi: 10.5194/egusphere-egu2020-15185.

ALBERT, Carlo und Simone ULZEGA, 2020. Stochastic resonance could explain recurrence of Grand Minima. In: EGU General Assembly 2020, online, 4-8 May 2020. Conference presentation. 2020

Albert, Carlo, and Simone Ulzega. 2020. “Stochastic Resonance Could Explain Recurrence of Grand Minima.” Conference presentation. In EGU General Assembly 2020, Online, 4-8 May 2020. https://doi.org/10.5194/egusphere-egu2020-15185.

Albert, Carlo, and Simone Ulzega. “Stochastic Resonance Could Explain Recurrence of Grand Minima.” EGU General Assembly 2020, Online, 4-8 May 2020, 2020, https://doi.org/10.5194/egusphere-egu2020-15185.